This repository has been archived on 2023-08-20. You can view files and clone it, but cannot push or open issues or pull requests.
yap-6.3/library/tries/core_tries.h

319 lines
15 KiB
C
Raw Normal View History

/*********************************************
File: core_tries.h
Author: Ricardo Rocha
Comments: Tries core module for Yap Prolog
version: $ID$
*********************************************/
/* -------------------------------------- */
/* Yap Tagging Scheme */
/* -------------------------------------- */
#include "config.h"
#if SIZEOF_INT_P==4
#define TAG_LOW_BITS_32 /* 'Tags_32LowTag.h' tagging scheme */
2011-05-30 15:30:02 +01:00
#define SIZE_FLOAT_AS_TERM 2
#elif SIZEOF_INT_P==8
#define TAG_64BITS /* 'Tags_64bits.h' tagging scheme */
2011-05-30 15:30:02 +01:00
#define SIZE_FLOAT_AS_TERM 1
#else
#error Unknown tagging scheme
#endif /* YAP_SCHEME */
/* --------------------------- */
/* Defines */
/* --------------------------- */
#ifdef TAG_LOW_BITS_32
#define ApplTag 1 /* 0x01 */
#else /* TAG_64BITS */
#define ApplTag 5 /* 0x05 */
#endif /* TAG_SCHEME */
#define PairInitTag 3 /* 0x03 */
#define PairEndEmptyTag 19 /* 0x13 */
#define PairEndTermTag 99 /* 0x63 */
#define CommaInitTag 35 /* 0x23 */
#define CommaEndTag 51 /* 0x33 */
#define FloatInitTag 67 /* 0x43 */
#define FloatEndTag 83 /* 0x53 */
#define TRIE_MODE_STANDARD 0
#define TRIE_MODE_REVERSE 1
#define TRIE_MODE_MINIMAL 2
#define TRIE_MODE_REVMIN TRIE_MODE_REVERSE || TRIE_MODE_MINIMAL //3
#define TRIE_PRINT_NORMAL 0
#define TRIE_PRINT_FLOAT 1
#define TRIE_PRINT_FLOAT2 2
#define TRIE_PRINT_FLOAT_END 3
2009-07-01 16:35:21 +01:00
#define BASE_AUXILIARY_TERM_STACK_SIZE 10000
/* --------------------------- */
/* Structs */
/* --------------------------- */
typedef struct trie_engine {
struct trie_node *first_trie;
/* in use */
YAP_Int memory_in_use;
YAP_Int tries_in_use;
YAP_Int entries_in_use;
YAP_Int nodes_in_use;
/* max used */
YAP_Int memory_max_used;
YAP_Int tries_max_used;
YAP_Int entries_max_used;
YAP_Int nodes_max_used;
} *TrEngine;
#define TrEngine_trie(X) ((X)->first_trie)
#define TrEngine_memory(X) ((X)->memory_in_use)
#define TrEngine_tries(X) ((X)->tries_in_use)
#define TrEngine_entries(X) ((X)->entries_in_use)
#define TrEngine_nodes(X) ((X)->nodes_in_use)
#define TrEngine_memory_max(X) ((X)->memory_max_used)
#define TrEngine_tries_max(X) ((X)->tries_max_used)
#define TrEngine_entries_max(X) ((X)->entries_max_used)
#define TrEngine_nodes_max(X) ((X)->nodes_max_used)
typedef struct trie_node {
struct trie_node *parent;
struct trie_node *child;
struct trie_node *next;
struct trie_node *previous;
YAP_Term entry;
} *TrNode;
#define TrNode_parent(X) ((X)->parent)
#define TrNode_child(X) ((X)->child)
#define TrNode_next(X) ((X)->next)
#define TrNode_previous(X) ((X)->previous)
#define TrNode_entry(X) ((X)->entry)
typedef struct trie_hash {
struct trie_node *parent; /* for compatibility with the trie_node data structure */
struct trie_node **buckets;
int number_of_buckets;
int number_of_nodes;
} *TrHash;
#define TrHash_mark(X) ((X)->parent)
#define TrHash_buckets(X) ((X)->buckets)
#define TrHash_bucket(X,N) ((X)->buckets + N)
#define TrHash_num_buckets(X) ((X)->number_of_buckets)
#define TrHash_seed(X) ((X)->number_of_buckets - 1)
#define TrHash_num_nodes(X) ((X)->number_of_nodes)
#define TYPE_TR_ENGINE struct trie_engine
#define TYPE_TR_NODE struct trie_node
#define TYPE_TR_HASH struct trie_hash
#define SIZEOF_TR_ENGINE sizeof(TYPE_TR_ENGINE)
#define SIZEOF_TR_NODE sizeof(TYPE_TR_NODE)
#define SIZEOF_TR_HASH sizeof(TYPE_TR_HASH)
#define SIZEOF_TR_BUCKET sizeof(TYPE_TR_NODE *)
#define AS_TR_NODE_NEXT(ADDR) (TrNode)((unsigned long int)(ADDR) - 2 * sizeof(struct trie_node *))
/* --------------------------- */
/* Macros */
/* --------------------------- */
#define TAG_ADDR(ADDR) ((unsigned long int)(ADDR) | 0x1)
#define UNTAG_ADDR(ADDR) ((unsigned long int)(ADDR) & ~(0x1))
#define PUT_DATA_IN_LEAF_TRIE_NODE(TR_NODE, DATA) TrNode_child(TR_NODE) = (TrNode)TAG_ADDR(DATA)
#define GET_DATA_FROM_LEAF_TRIE_NODE(TR_NODE) UNTAG_ADDR(TrNode_child(TR_NODE))
#define MARK_AS_LEAF_TRIE_NODE(TR_NODE) PUT_DATA_IN_LEAF_TRIE_NODE(TR_NODE, TrNode_child(TR_NODE))
#define IS_LEAF_TRIE_NODE(TR_NODE) ((unsigned long int)(TrNode_child(TR_NODE)) & 0x1)
#define IsTrieVar(TERM, STACK, STACK_BASE) ((YAP_Term *)(TERM) > STACK && (YAP_Term *)(TERM) <= STACK_BASE)
#define MkTrieVar(INDEX) ((INDEX) << 4)
#define TrieVarIndex(TERM) ((TERM) >> 4)
#define BASE_HASH_BUCKETS 64
#define MAX_NODES_PER_TRIE_LEVEL 8
#define MAX_NODES_PER_BUCKET (MAX_NODES_PER_TRIE_LEVEL / 2)
#define HASH_TERM(TERM, SEED) (((TERM) >> 4) & (SEED))
#define IS_HASH_NODE(NODE) (TrHash_mark(NODE) == NULL)
#define BASE_SAVE_MARK 1000 /* could lead to errors if the number of different variables in a term is greater than it */
#define HASH_SAVE_MARK ((YAP_Term) MkTrieVar(BASE_SAVE_MARK))
#define ATOM_SAVE_MARK ((YAP_Term) MkTrieVar(BASE_SAVE_MARK + 1))
#define FUNCTOR_SAVE_MARK ((YAP_Term) MkTrieVar(BASE_SAVE_MARK + 2))
#define FLOAT_SAVE_MARK ((YAP_Term) MkTrieVar(BASE_SAVE_MARK + 3))
#define STACK_NOT_EMPTY(STACK, STACK_BASE) STACK != STACK_BASE
#define POP_UP(STACK) *--STACK
#define POP_DOWN(STACK) *++STACK
#define PUSH_UP(STACK, ITEM, STACK_TOP) \
{ if (STACK < STACK_TOP) { \
fprintf(stderr, "**************************************\n"); \
fprintf(stderr, " Tries core module: term stack full\n"); \
fprintf(stderr, "**************************************\n"); \
} \
*STACK = (YAP_Term)(ITEM); \
STACK--; \
}
#define PUSH_DOWN(STACK, ITEM, STACK_TOP) \
{ if (STACK > STACK_TOP) { \
fprintf(stderr, "**************************************\n"); \
fprintf(stderr, " Tries core module: term stack full\n"); \
fprintf(stderr, "**************************************\n"); \
} \
*STACK = (YAP_Term)(ITEM); \
STACK++; \
}
#define new_struct(STR, STR_TYPE, STR_SIZE) \
STR = (STR_TYPE *) YAP_AllocSpaceFromYap(STR_SIZE)
#define new_trie_engine(TR_ENGINE) \
{ new_struct(TR_ENGINE, TYPE_TR_ENGINE, SIZEOF_TR_ENGINE); \
TrEngine_trie(TR_ENGINE) = NULL; \
TrEngine_memory(TR_ENGINE) = 0; \
TrEngine_tries(TR_ENGINE) = 0; \
TrEngine_entries(TR_ENGINE) = 0; \
TrEngine_nodes(TR_ENGINE) = 0; \
TrEngine_memory_max(TR_ENGINE) = 0; \
TrEngine_tries_max(TR_ENGINE) = 0; \
TrEngine_entries_max(TR_ENGINE) = 0; \
TrEngine_nodes_max(TR_ENGINE) = 0; \
}
#define new_trie_node(TR_NODE, ENTRY, PARENT, CHILD, NEXT, PREVIOUS) \
{ new_struct(TR_NODE, TYPE_TR_NODE, SIZEOF_TR_NODE); \
TrNode_entry(TR_NODE) = ENTRY; \
TrNode_parent(TR_NODE) = PARENT; \
TrNode_child(TR_NODE) = CHILD; \
TrNode_next(TR_NODE) = NEXT; \
TrNode_previous(TR_NODE) = PREVIOUS; \
INCREMENT_NODES(CURRENT_TRIE_ENGINE); \
INCREMENT_MEMORY(CURRENT_TRIE_ENGINE, SIZEOF_TR_NODE); \
}
#define new_trie_hash(TR_HASH, NUM_NODES, NUM_BUCKETS) \
{ new_struct(TR_HASH, TYPE_TR_HASH, SIZEOF_TR_HASH); \
TrHash_mark(TR_HASH) = NULL; \
TrHash_num_buckets(TR_HASH) = NUM_BUCKETS; \
new_hash_buckets(TR_HASH, NUM_BUCKETS); \
TrHash_num_nodes(TR_HASH) = NUM_NODES; \
INCREMENT_MEMORY(CURRENT_TRIE_ENGINE, SIZEOF_TR_HASH); \
}
#define new_hash_buckets(TR_HASH, NUM_BUCKETS) \
{ int i; void **ptr; \
new_struct(ptr, void *, NUM_BUCKETS * sizeof(void *)); \
TrHash_buckets(TR_HASH) = (TYPE_TR_NODE **) ptr; \
for (i = NUM_BUCKETS; i != 0; i--) \
*ptr++ = NULL; \
INCREMENT_MEMORY(CURRENT_TRIE_ENGINE, (NUM_BUCKETS) * SIZEOF_TR_BUCKET); \
}
#define expand_auxiliary_term_stack() \
{ YAP_Term *aux_stack; \
YAP_Int aux_size = CURRENT_AUXILIARY_TERM_STACK_SIZE * sizeof(YAP_Term); \
new_struct(aux_stack, YAP_Term, aux_size * 2); \
memcpy(aux_stack, AUXILIARY_TERM_STACK, aux_size); \
free_struct(AUXILIARY_TERM_STACK); \
AUXILIARY_TERM_STACK = aux_stack; \
CURRENT_AUXILIARY_TERM_STACK_SIZE *= 2; \
}
#define free_struct(STR) \
YAP_FreeSpaceFromYap((char *) (STR))
#define free_trie_node(STR) \
{ free_struct(STR); \
DECREMENT_NODES(CURRENT_TRIE_ENGINE); \
DECREMENT_MEMORY(CURRENT_TRIE_ENGINE, SIZEOF_TR_NODE); \
}
#define free_trie_hash(STR) \
{ free_struct(STR); \
DECREMENT_MEMORY(CURRENT_TRIE_ENGINE, SIZEOF_TR_HASH); \
}
#define free_hash_buckets(STR, NUM_BUCKETS) \
{ free_struct(STR); \
DECREMENT_MEMORY(CURRENT_TRIE_ENGINE, (NUM_BUCKETS) * SIZEOF_TR_BUCKET); \
}
#define INCREMENT_MEMORY(TR_ENGINE, SIZE) \
{ TrEngine_memory(TR_ENGINE) += SIZE; \
if (TrEngine_memory(TR_ENGINE) > TrEngine_memory_max(TR_ENGINE)) \
TrEngine_memory_max(TR_ENGINE) = TrEngine_memory(TR_ENGINE); \
}
#define INCREMENT_TRIES(TR_ENGINE) \
{ TrEngine_tries(TR_ENGINE)++; \
if (TrEngine_tries(TR_ENGINE) > TrEngine_tries_max(TR_ENGINE)) \
TrEngine_tries_max(TR_ENGINE) = TrEngine_tries(TR_ENGINE); \
}
#define INCREMENT_ENTRIES(TR_ENGINE) \
{ TrEngine_entries(TR_ENGINE)++; \
if (TrEngine_entries(TR_ENGINE) > TrEngine_entries_max(TR_ENGINE)) \
TrEngine_entries_max(TR_ENGINE) = TrEngine_entries(TR_ENGINE); \
}
#define INCREMENT_NODES(TR_ENGINE) \
{ TrEngine_nodes(TR_ENGINE)++; \
if (TrEngine_nodes(TR_ENGINE) > TrEngine_nodes_max(TR_ENGINE)) \
TrEngine_nodes_max(TR_ENGINE) = TrEngine_nodes(TR_ENGINE); \
}
#define DECREMENT_MEMORY(TR_ENGINE, SIZE) \
TrEngine_memory(TR_ENGINE) -= SIZE
#define DECREMENT_TRIES(TR_ENGINE) \
TrEngine_tries(TR_ENGINE)--
#define DECREMENT_ENTRIES(TR_ENGINE) \
TrEngine_entries(TR_ENGINE)--
#define DECREMENT_NODES(TR_ENGINE) \
TrEngine_nodes(TR_ENGINE)--
#define IS_FUNCTOR_NODE(N) (((ApplTag & TrNode_entry(N)) == ApplTag) && \
(TrNode_entry(N) != PairInitTag) && \
(TrNode_entry(N) != PairEndEmptyTag) && \
(TrNode_entry(N) != PairEndTermTag))
/* --------------------------- */
/* API */
/* --------------------------- */
inline TrEngine core_trie_init_module(void);
inline TrNode core_trie_open(TrEngine engine);
inline void core_trie_close(TrEngine engine, TrNode node, void (*destruct_function)(TrNode));
inline void core_trie_close_all(TrEngine engine, void (*destruct_function)(TrNode));
inline void core_trie_set_mode(YAP_Int mode);
inline YAP_Int core_trie_get_mode(void);
inline TrNode core_trie_put_entry(TrEngine engine, TrNode node, YAP_Term entry, YAP_Int *depth);
inline TrNode core_trie_check_entry(TrNode node, YAP_Term entry);
inline YAP_Term core_trie_get_entry(TrNode node);
inline void core_trie_remove_entry(TrEngine engine, TrNode node, void (*destruct_function)(TrNode));
inline void core_trie_remove_subtree(TrEngine engine, TrNode node, void (*destruct_function)(TrNode));
inline void core_trie_add(TrNode node_dest, TrNode node_source, void (*add_function)(TrNode, TrNode));
inline void core_trie_join(TrEngine engine, TrNode node_dest, TrNode node_source, void (*add_function)(TrNode, TrNode), void (*copy_function)(TrNode, TrNode));
inline void core_trie_intersect(TrEngine engine, TrNode node_dest, TrNode node_source, void (*add_function)(TrNode, TrNode), void (*destruct_function)(TrNode));
inline YAP_Int core_trie_count_join(TrNode node1, TrNode node2);
inline YAP_Int core_trie_count_intersect(TrNode node1, TrNode node2);
inline void core_trie_save(TrNode node, FILE *file, void (*save_function)(TrNode, FILE *));
inline TrNode core_trie_load(TrEngine engine, FILE *file, void (*load_function)(TrNode, YAP_Int, FILE *));
inline void core_trie_stats(TrEngine engine, YAP_Int *memory, YAP_Int *tries, YAP_Int *entries, YAP_Int *nodes);
inline void core_trie_max_stats(TrEngine engine, YAP_Int *memory, YAP_Int *tries, YAP_Int *entries, YAP_Int *nodes);
inline void core_trie_usage(TrNode node, YAP_Int *entries, YAP_Int *nodes, YAP_Int *virtual_nodes);
inline void core_trie_print(TrNode node, void (*print_function)(TrNode));
inline void core_disable_hash_table(void);
inline void core_enable_hash_table(void);
inline YAP_Term core_trie_to_list(TrNode node);
#include "core_dbtries.h"